Stop Invoice Creation for Incomplete Sales Order line items

Hello,

I have one situation regarding the creation of billing document.

I have created the one delivery for 5 sales orders

Sales order 1

Sales order 2

Sales order 3           Delivery 1

Sales order 4

Sales order 5

Now the New item is entered in Sales Order 1, which is
Incomplete (As per the Incompletion log)

Now if I will make a Invoice of Delivery 1 this will not
include the material for Sales order 1 due to incompletion error in sales order.

But what we required is STOP the Invoice of whole delivery
itself and system should give error for same. System should not allow to make a
invoice for other material also from Sales order.

Please let me know the possible solution.

Thank you,

Kashti